I get a brick/block of dry ice and put it in the bottom of the cooler, wrapped in a couple layers of aluminum foil and then put a layer of ice on it and then put the beverages in.... It will freeze the melted ice on the bottom of the cooler and last the whole weekend... Just keep throwing some fresh ice in the morning and at night and it will keep everything nice and cool.... Then when you can finally get the frozen bottom ones by Saturday or Sunday when I leave on Thursday for a show like the Nats...